hierarchical notes programs - this is going to be a very difficult review, only those with the time to do this properly should volunteer.file explorer replacement - same thing, very difficult review and likely to be very controversialarchive management tools - much easier i think, not too many big names (winrar,winzip) and some good freeware ones (7zip)

I don't have the guts to volunteer here, although I've done software reviews on my private website for years. I'd like to suggest though, that when doing file managers, you please include my favorite: FreeCommander.